Oil-burning boiler-furnace



D. I. IRISH.

OIL BURNING BOLLER FURNACE. APPLICATION FILED IIAYIs. IsI.

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D. 1. IRISH. OIL BURNING BOILER FURNACI.v

APPLICATION FILED MAY I5, |918.

Patented Jan. 4, 1921.

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UNITED STATES PATENT OFFICE.

DAVID J. IRISH, OF BARBERTON, OHIO, ASSIGNOR TO THE BABCOCK & 'WILCOXCOM- PANY, OF BAYONNE, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

OIL-BURNING BOILER-FURNACE.

Application filed May 15,

T 0 all whom t .may concern:

Be it known that I, DAVID J. IRISH, a citizen of the United States,residing at Barberton, in Summit county, State of Ohio, have invented anew and useful Improvement in Oil-Burning Boiler-Furnaces, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, forming part of this specification, inwhich- Figure 1 isa partial longitudinal vertical section of a Stirlingboiler provided with my improved oil burning,l furnace; Fig. 2 is asection on the line II-II of Fig. 1 looking downwardly; Fig. 3 is anenlarged detail view on a. larger scale showing the burner arrangementwith a modified form of hood; Fig. 4 is a' view similar to Fig. 3showing another form of hood; Fig. 5 is a vertical section on the lineV-V of Fig. 1, and Fig. 6 is a View similar to Fig. 5 showing separatedair ducts for the burners.

My invention relates to the type of oil .burning furnaces for boilerswhere the burner pipes extend underneath the floor of the combustionchamber from the front of the ash pit and are provided with upwardlyextending burners from which flames are projected forwardly into thecombustion chamber.

The object of the invention is to simplify and improve the construction,to make the burners and burner pipes easily replaceable and removable,and to improve the efficiency of the structure.

In the drawings, referring to the form of Figs. 1, 2 and 5, 2 representsthe mud drum of a Stirling boiler having the usual three banks of watertubes 3, 4 and 5 leading upwardly to the steam and water drums. Thefurnace may, of course, be used with any desirable type of boiler. Therefractory tile floor 6 of the combustion chamber 7 is preferablyinclined downwardly vand rearwardly from the front wall 8, and supportedon suitable framework, such as the transverse I-beams 9. The transversebridge wall 10 preferably has a straight plain front face at the rear ofthe combustion chamber and added to the front face of this bridge wallare the separating baies 11 and l12. These baffles are arranged as.shown in Fig. 2, so as to provide separators between the three burners13 while affording long transverse slots 14 which communi- Specificationof Letters Patent. l

Patented J an. 4, 1921.

191s. serial No. 234,707.

cate at their bottom ends with the ash pit space. The front portions ofthese slots are inclosed by the side extensions 15 of the separatingbaflles, the edges of which, in front of the boiler, are preferablychamfered or beveled forwardly and outwardly, as shown in Fig. 2, toallow for the diverging flames from the burners. The general shape ofthe flames is shown in dotted lines in Fig. 2. Over the tops of theseseparating battles extends the refractory roof or hood 16 which projectsabove the burners and aids in deflecting the llame outwardly through thecombustion chamber, The burner pipes 17 extend underneath the floor,rest "on suitable transverse supports `18 and carry at their rear endsthe right angle branch burner pipes 19. The burner pipes may be slidback under the floor with the branch pipes horizontally until they areat the rear of the floor, when, by reason of the slotted chambers 14,the burner pipes may turn upwardly into operative position, registeringwith the slots in the baffles. In front of each burner, the floonispreferably provided with slots or holes 20, and, as shown in Fig. 2, thegroup of slots in front of each burner is preferably arranged infan-shape so as to supply air under the vdiverging fan-shaped flame fromeach burner. As shown in this form, the hood 16 extends continuouslyacross the bridge wall and is recessed into it.

The vertical slots, behind which the burners are located, extend to thefloor of the furnace chamber, and thus communicate throughout theirentire height with the chambers 14. By this arrangement, an air space isprovided to supply air directly from the air duct to the stream of oiland steam as it issues from the burner. The

, lighter oils are immediately burned and this,

in turn, causes a sudden and greater eX- pansion and atomization of theheavier oils as thev latter. are projected intoithe furnace chamber.This increased atomization lowers the quantity of steam that would benecessary for this purpose if the stream from the burner'were projectedinto the furnace chamber through a mere hole in the baffle wall.Particularly when the arrangementV just described is used, I find itdesirable to space the rst air opening in the fan-shaped arrangement inthe furnace floor away from the bridge wall, so as to give the lighteroils time to burn with the air sgpplied through the lower part of thevertical'slots, before a large quantity of air is supplied to the fuelstream through the floor.

In Fig. 3, I show a form similar to the first form except that the hood16a is inclined forwardly and upwardly, y.resting partly on the bridgewall and partly on the separatingbaffles.

In-Fig. 4 I show a form similar to the first form except that 'the hood16". is shorter and more or less rudimentary.

The ash pit may be one continuous chamber, as shown in Figs. 1, 2 and 5,or the air may be supplied to'each burner slot or ocket separately bymeans of the separatving partitions 2l shown in Fig. 6. This form ofFig. 6 is the same as the first form except for this separation of theash pit into separate air ducts for the air flowing back to each burner.

In the form of Figs. l, 2 and 5, 22 are dempers at the front of the ashpit by which the air inlet thereto may be controlled.

In the form of Fig. 6 there will be one of these dampers foreach of theair ducts, while in the first form as -many of these dampers may beprovided as may be desired.

The advantages of my invention result from the use of the transverseslots which allow the branch burner pipes to be turned up into positionand from the continuous supporting of the hood top, burner plate on thebridge wall and extensions without any arches or complex brickstructures.

The fan-shape of the air openings 2O aidsl in properl supplying air forcomplete combustion, w ile the front dampers control the air suppliesdesired.

What I claim and desire to secure by Let- .ters Patent of the UnitedStates is- 1. In an oil burning furnace, a bridge wall having aplurality of separatetrans- Verse pockets with openings into thecombustion chamber, and a plurality of fuel pipes extending under thefloor of the combustion chamber and each having an angularpipe'extension adapted to be moved up S into place within one of saidpockets, and

a burner on the end ofeach pipe extension,

said openings being narrower than the ockets and located directly infront of the urners and extending dowI/iward to the ioor ofthe furnace.

2. In an oil burning furnace, a 'bridge wall having a plurality ofseparate transverse hooded. pockets with openings into` furnace.

the combustion chamber, a plurality of fuel pipes extending under thefloor of the combustion chamber and each havingan angular pipe extensionadapted` to be moved upl Hoor, a bridge wall at the rear of the floorandhaving a sdewise elongated pocket, a fuel pipe having lan angularextension arranged to--be moved up into place within the elongatedpocket, a burner on the end of the angular extension, and air supplyports through the floor in front of the pocket and arranged in divergingform with the port nearest the pocket spaced from the bridge wall, saidpockets 'being provided with an opening narrower than the pocket andlocated directly in front of the burner and extending downward to thefloor of the 4. In-a furnace of the class described, a bridge wallhaving a substantially flat front face, an added baffle wall in front'of the bridge wall forming transverse pockets and provided with a topcover or hood extending horizontally and restin on the bridge wall andadded baiie, and oil pipes extending under the floor and having angularextensions arranged to be turned into position within the pockets,substantially as described,

5. In an oil burning furnace, a combustion chamber having a hoodprojecting toward the chamber, an air duct beneath the chamber, thefloor of the chamber having a chamber and the duct, a fuel pipeextending through the air duct to the slot, an angular pipe extension onthe fuel pipe extending up through the slot and a single burner on thepipe extension and located be- -neath the hood, the fuelpipe, extensionand burner being constructed and arranged to permit. the burner to beswun into position, through the slot by rotating the fuel p1 e.

n testimony whereof I have hereunto signed my name in the presence oftwo sub- Scribing Witnesses.

v DAVID J. IRISH.

Witnesses:-

A. G. KiRBY, E. W. ARNOLD.

